package com.sky.service.impl;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {


    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;


    @Autowired
    private AddressBookMapper addressBookMapper;


    @Autowired
    private ShoppingCartMapper shoppingCartMapper;


    @Autowired
    private UserMapper userMapper;


    @Autowired
    private WebSocketServer webSocketServer;


    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {


        /**
         *  1.处理业务异常( 1.地址薄为空,2，购物车为空)
         */

        //根据地址薄id查询地址薄信息
        //判断地址薄是否为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //根据用户id查询购物车信息
        //判断购物车是否为空
        ShoppingCart shoppingCart = new ShoppingCart();
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if(shoppingCartList==null||shoppingCartList.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }


        /**
         * 2.向订单表插入一条数据
         */
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);

        orders.setAddress(addressBook.getDetail());

        // 设置下单时间
        orders.setOrderTime(LocalDateTime.now());

        // 设置订单支付状态
        orders.setPayStatus(Orders.UN_PAID);

        // 设置订单状态
        orders.setStatus(Orders.PENDING_PAYMENT);

        // 设置订单号
        orders.setNumber(String.valueOf(System.currentTimeMillis()));

        // 设置收货人电话
        orders.setPhone(addressBook.getPhone());

        // 设置收货人
        orders.setConsignee(addressBook.getConsignee());

        // 设置用户Id
        orders.setUserId(userId);


        orderMapper.insert(orders);

        /**
         *  3.向订单详情表插入多条数据
         */
        List<OrderDetail> orderDetails=new ArrayList<>();

        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }
         orderDetailMapper.insertBatch(orderDetails);


        /**
         * 4.清空当前用户的购物车数据
         */

        shoppingCartMapper.delteByUserId(userId);


        /**
         * 5.返回VO对象
         */

        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单

        //发现没有将支付时间 check_out属性赋值，所以在这里更新
        LocalDateTime check_out_time = LocalDateTime.now();

        //获取订单号码
        String orderNumber = ordersPaymentDTO.getOrderNumber();

        log.info("调用updateStatus，用于替换微信支付更新数据库状态的问题");
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderNumber);
        paySuccess(orderNumber);
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map = new HashMap();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content","订单号："+outTradeNo);
        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 分页查询历史订单
     * @param page
     * @param pageSize
     * @param status
     * @return
     */

    @Override
    public PageResult pageQuery4User(int page, int pageSize, Integer status) {

        //设置分页
        PageHelper.startPage(page, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);


        //查询订单
        Page<Orders> ordersPage = orderMapper.pageQuery4User(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        //查询订单对应的口味表
        if(ordersPage != null &&ordersPage.getTotal() > 0){

            for (Orders orders : ordersPage) {
                Long id = orders.getId();
                List<OrderDetail> orderDetails= orderDetailMapper.getByOrderId(id);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);

            }
        }
      return new PageResult(ordersPage.getTotal(), list);
    }

    @Override
    public OrderVO details(Long orderId) {
        Orders orders = orderMapper.getById(orderId);
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    @Override
    public void cancel(Long orderId) {

        Orders order = orderMapper.getById(orderId);
        // 校验订单是否存在
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //
        /**校验订单状态
         * 订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
         * - 待支付和待接单状态下，用户可直接取消订单
         * - 商家已接单状态下，用户取消订单需电话沟通商家
         * - 派送中状态下，用户取消订单需电话沟通商家
         * - 如果在待接单状态下取消订单，需要给用户退款
         * - 取消订单后需要将订单状态修改为“已取消”
         */
        if(order.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(order.getId());

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        /**
         * - 取消订单其实就是将订单状态修改为“已取消”
         * - 商家取消订单时需要指定取消原因
         * - 商家取消订单时，如果用户已经完成了支付，需要为用户退款
         */
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());

        //如果为支付状态需要退款
//
//             Integer payStatus = ordersDB.getPayStatus();
//                  if (payStatus == 1) {
//                      //用户已支付，需要退款
//                     String refund = weChatPayUtil.refund(
//                              ordersDB.getNumber(),
//                              ordersDB.getNumber(),
//                              new BigDecimal(0.01),
//                             new BigDecimal(0.01));
//                      log.info("申请退款：{}", refund);
//                  }
//




        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders newOrders = new Orders();
        newOrders.setId(ordersCancelDTO.getId());
        newOrders.setStatus(Orders.CANCELLED);
        newOrders.setCancelReason(ordersCancelDTO.getCancelReason());
        newOrders.setCancelTime(LocalDateTime.now());
        orderMapper.update(newOrders);

    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetails.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());


        shoppingCartMapper.insertBatch(shoppingCartList);
    }


    /**
     * 管理端查询订单列表
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery4User(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }


    /**
     * 各个状态订单的统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);

        return orderStatisticsVO;

    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }


    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        /**
         * - 商家拒单其实就是将订单状态修改为“已取消”
         * - 只有订单处于“待接单”状态时可以执行拒单操作
         * - 商家拒单时需要指定拒单原因
         * - 商家拒单时，如果用户已经完成了支付，需要为用户退款
         */
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());


        //只有订单处于“待接单”状态时可以执行拒单操作
        if(orders==null||orders.getStatus()!=Orders.TO_BE_CONFIRMED){
                throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }


        Orders newOrders = new Orders();
        newOrders.setId(orders.getId());
        newOrders.setStatus(Orders.CANCELLED);
        newOrders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        newOrders.setCancelTime(LocalDateTime.now());

        orderMapper.update(newOrders);


    }

    @Override
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(id);

        if(orders==null||orders.getStatus()!=Orders.CONFIRMED){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders newOrders = new Orders();
        newOrders.setId(id);
        newOrders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(newOrders);
    }

    /**
     * 订单完成
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders orders = orderMapper.getById(id);

        if(orders==null||orders.getStatus()!=Orders.DELIVERY_IN_PROGRESS){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders newOrders = new Orders();
        newOrders.setId(id);
        newOrders.setStatus(Orders.COMPLETED);
        newOrders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(newOrders);
    }

    /**
     * 用户催单提醒
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders order = orderMapper.getById(id);
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map=new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号："+order.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
